Yeah they pretty much smoke the same, but each has different aesthetic aspects to them.
Hehe imo, I'd go with the Diva. They look cute!
They are a lil more pricier, but I think its worth it.
I have not personally had this problem...But I've heard that the Mya QT bases have become really thin. Its to a point that some people have the bases break or crack on them very easily.
Heh out of both of 'em...Like I said, get the Diva!